| 摘要 |
PROBLEM TO BE SOLVED: To provide a node device which allows for transition of a gateway device, registered on a routing table, to a state ready to replacement with other gateway device, and to provide route swapping method, and program.SOLUTION: When a communication unit 10 receives a hallow frame, a link management unit 32 refers a routing table T1 for GW. If the transmission source of the hallow frame thus received is an adjacent node device 1 becoming a first route to a main gateway device in its own device 1, and the route quality of the main gateway device in its own device 1 is worst, among the gateway devices registered in the routing table T1 for GW of the transmission source excepting the main gateway device, the main gateway device in its own device 1 is changed to other gateway device registered in the routing table T1 for GW. |
